<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
    <script type="text/javascript" src="./js/vue.js"></script>
</head>

<body>
    <!-- 准备好一个容器 -->
    <div id="root">
        <h2>人员列表</h2>
        <button @click="updateMei">更新马冬梅</button>
        <ul>
            <li v-for="(p,index) of persons" :key="p.id">
                {{p.name}}--{{p.age}}--{{p.sex}}
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        Vue.config.productionTip = false;  //阻止Vue在启动时生成 生产提示
        new Vue({
            // 用计算属性实现
            el: '#root',
            data: {
                persons: [
                    { id: '001', name: '马冬梅', age: 27, sex: '女' },
                    { id: '002', name: '李冬冬', age: 28, sex: '女' },
                    { id: '003', name: '周杰伦', age: 30, sex: '男' },
                    { id: '004', name: '任嘉伦', age: 26, sex: '男' }
                ],
            },
            methods:{
                updateMei(){
                    // this.persons[0].name='马老师'
                    // this.persons[0].age=50,
                    // this.persons[0].sex='男'
                    // this.persons[0]={id:'001',name:'马老师',age:'50',sex:'男'}  //以上都不奏效
                    this.persons.splice(0,1,{id:'001',name:'马老师',age:'50',sex:'男'})
                }
            }
        })
    </script>
</body>